Breakout Discussion – Operations

[Anonymous]

Jason Schutterle, Sinclair Oil & Steve Carlisle, Lyondellbasell
 
BEST PRACTICES
–          Quench Cycles/Hot Spots
Totalizers for quench water and sour water
–          Furnace Issues
Burner cleaning/maintenance
                PM programs
                Operations Flexibility
Spalling
 
Velocity Steam
                Heater Inlet PI is a good indicator
                Charts with valve position and flow rates
START UP
–          Make sure the system is dry
–          Air Free
–          Take it slow
–          Start antifoam right away
–          Start on minute rate
–          Down fill 1[sup]st[/sup] drum all the way
–          Test Interlocks
–          Make sure all electrical equipment is on
–          Test deluge
 
SWITCH VALVES
–          System purge is important
Lack of steam purge can cause reliability issues with valves
                N2 for back up purge
HCGO Properties
–          Increasing recycle with lower C.R
–          Quench Oil
Time/Temp
HCGO/ LCGO/ Slop
                Need enough to keep O.H lines wet to prevent fouling
–          Wash Section – too much pressure can make wash nozzles not work.
ANTIFOAM
600,000 cc
–          Some have antifoam on level control
–          Carrier
LCGO/HCGO
Ratio Controller
–          Injection Points
Top is best
–          Foamovers
Good level indication
VELOCITY STEAM (Best Practices)
–          Looking at heater inlet PIs for steam rates
–          Charts with valve position and flow rates
–          If flow meters work use them
LOTO FOR CONTRACT CUTTING
Lock out before it’s handed over to contractors.  Contractors apply locks too.
FURNACE ISSUES (Best Practices)
–          Rate of rise on skin Tis.
–          Burner Cleaning

• Quarterly inspection/ cleaning

–          Spalling

• Some use steam without shocking
• Some use BFW.  Could contain chemicals though
• Spall as much as possible until you have to come down

QUENCH CYCLES/ HOTSPOTS (Best Practices)
–          How much sour water make
–          Totalizer for water
–          ½ hour soak helps
–          Back pressure on drums to mitigate hot spots
–          Drain and re-quench if you have a hot drum
 
 
SLURRY FEED (FCC)
–          Put to quench, can cause problems

• Coke fines plugging filters
• Decant coming in cold

–          Best Practice – Bring in with Feed.

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